NewConn requires a delegate

[isadon]

Why does NewConn require a delegate interface? I put in nil for the parameter and get a nil pointer dereference crash in go-nsq. Considering that nil can be passed in for an interface I think the documentation for this method should state that its required.

[mreiferson]

There's really no reason to ever use the NewConn interface, it probably shouldn't be exported but that ship has ⛵ .